Ok, sorry for the late follow up on this. I havn't been on the msg board in awhile.
I have been training in Shotokan Karate for the last, eh, almost 3 years. I'm going for my black-belt in about 6 months.
Anyway, I didn't know much about martial arts when I started. In the big-picture, I still don't know all that much. However, I do know alot more than I used to. There are lot of web cites that can give you a basic run-down of the different styles. There are two main camps, internal (soft) styles, and external (hard) styles. Tai Chi is an exmaple of a 'soft' style. Shotokan karate is an example of a 'hard' style. Chinese styles tend to be more 'art'. Japanese styles tend to be more 'martial'. In some styles you wont break a sweat during training. In others you'll be doing some serious cardio work outs. They all have something worth while to teach, so the best bet is to find something that fits your persoanlity and something you feel comfortbale doing. Any good bookstore will have a copy of "Complete Idiots Guide to Martial Arts". I'd strongly suggest taking a look at it. It has a good run-down of all the basic styles (thi chi, kung fu, karate, kick-boxing, tea kwon doe, etc), and what can be expected from each style.
here's a few good web cites.
http://www.24fightingchickens.com/shotokan/index.htmlhttp://martialarts.about.com/library/weekl...s11_martialartsgood luck, and best training!
-chr|st0pher